feat: re-implement contact form submissions api endpoint for website

src/BusProNet/XmlLoader/HotelLoader.php

@@ -48,6 +48,9 @@ class HotelLoader extends AbstractLoader
         return null;
     }
 
+    /**
+     * @throws HotelNotFoundException
+     */
     public function loadById(int $id, ?string $filename = 'hotel.xml'): Hotel
     {
         $hotels = $this->loadAll($filename);